Shepard's on Lexis Advance and Keycite on Westlaw list subsequent cases that cited the case in question, and whether the subsequent case overruled or followed the case in question. In order to make sure a case is "still good law", don't stop at Shepard's or Keycite.
Thorough research of a question through electronic searches and/or secondary sources should reveal any changes in the law.
Additionally, you should also check the statutes to see if the case was overruled by statute, although Shepards and Keycite often reflect when a case is overruled by statute.
Note that you can find cases in your Keycite results that are from the 10th Dist. Ct. of Appeals by limiting by jurisdiction on the left hand side of the page.